Work

Spectro‐Temporal Ratiometric Strategy for Thermally Invariant Optical Manometry

Year: 2026

Type: article

Abstract: ABSTRACT Optical manometry provides noncontact pressure sensing but remains vulnerable to temperature‐induced drift, where thermal expansion and nonradiative relaxation distort luminescence spectra and kinetics. We develop a spectro‐temporal ratiometric approach that combines spectral and time‐gated luminescence channels to decouple pressure and temperature responses and realize thermally invariant optical manometry. Using Y 3 In 2 Ga 3 O 12 :Cr 3+ as a rigid‐lattice host (D q/B ≈ 2.2), lattice stiffness minimizes thermal sensitivity S R,T , while ratiometric detection stabilizes pressure sensitivity S R,p . The resulting thermal‐invariance manometric factor ( TIMF) = S R,p / S R,T reaches ≈7700 K·GPa −1 in the spectral domain and ≈2500 K·GPa −1 in the time‐gated domain, with S R,p up to 51%·GPa −1 . These values exceed ruby benchmarks by two orders of magnitude and surpass conventional lifetime analysis by ∼40 times, enabling accurate, self‐referenced optical pressure mapping under extreme thermo‐mechanical conditions. This work provides luminescent manometry from empirical calibration to a quantitative framework for thermally reliable sensing in coupled fields.

Source: Advanced Materials

DOI: 10.1002/adma.202522909